I just ordered paint straining bags on Amazon that are recommended on here...I think you want to leave pulp in the bag while it ferments to extract color and tannins....then ring out the bag before racking and discard ....for 1$ a bag it makes it easy to do.That’s what I did with my chokecherries. I mashed them after boiling and then used a masher after simmering for 10 minutes and then dumped the 18 pounds of berries into a pillow case and squeezed all the juice into the water. It was 1.100. I put the yeast in 24 hours later.